| article html file updated | 7 February 2020 16:29 CET | Update | https://www.mdpi.com/2226-4310/3/4/33 |
| article html file updated | 5 May 2019 01:25 CEST | Update | - |
| article html file updated | 28 December 2016 11:27 CET | Update | - |
| article html file updated | 17 October 2016 13:29 CEST | Original file | - |
| article xml uploaded. | 17 October 2016 13:28 CEST | Update | https://www.mdpi.com/2226-4310/3/4/33/xml |
| article xml uploaded. | 17 October 2016 13:28 CEST | Original file | - |
| article pdf uploaded. | 17 October 2016 13:28 CEST | Version of Record | https://www.mdpi.com/2226-4310/3/4/33/pdf |
